Part of the reason we liked the Nexus 5 (2013) so much was that it incorporated technology that wasn’t mainstream yet – things like OIS and wireless charging. So it was disappointing to see the new Nexus phones take a step back, but at least now we know why.

Hiroshi Lockheimer, Android VP of Engineering, explained the reasoning behind the move in a Reddit AMA. Essentially, microUSB was seen as slow and a hassle and wireless charging made sense. Now USB Type-C plugs is easier to plug in and charges the battery faster, plus dropping Qi wireless charging allowed the engineers to make the phone thinner.

Straight from the horse's mouth:

...So, ease of plugging in + fast charging + optimizing for thinness made us double down on Type-C instead of wireless!

Now, the Nexus chargers are only 15W, while Oppo pushed 25W through microUSB 2.0 so the "fast charging" claim doesn’t stand.Plus we even have fast wireless chargers – not as fast as their wired counterparts, but much faster than what the Nexus 4 and 5 had.

Also, the Galaxy S6 is a full millimeter thinner than the Nexus 5X and it supports two wireless charging standards. True, its battery is 150mAh smaller, but I think making the phone 1mm thicker could easily have filled that in. So that's dubious too. The Galaxy S6 edge+ is thinner than the Nexus 6P too, though the difference in thickness is smaller, while the difference in battery bigger.

The USB Type-C is indeed easier to plug in, there's no reason for this to be an either-or situation. You can read the rest of the AMA here.

I've become accustomed to my wireless charger for three years and if necessary I will change to Samsung to continue having wireless charging available in my phone. I was considering the Marlin but it doesn't look like it's going to have the feature.

I see only one god reason to omit Qi wireless charging in 5X and 6P.
Google just wants some time to "rethink", to make another versions like 5XX or 6PP and kindly ask us to buy.
And what'd you think?
I'd buy this 5XX if they ready to t...

I charge my phone over night. I don't care - is it 15 minutes or 5 hours. I didn't use any charging cables in my phones for last 3 years.
Both or my family cars have phone holders with Qi.
Never missed Nexus model before (started with Nexus One...